Samsung has already revealed a few days back that Galaxy S III will be revealed at a separate event and now it seems company will launch other products as well at that event.
Company will still be present at MWC, but as a booth and will display the recent launches and new products if any announced during the event. This is a little odd behavior from this Korean manufacturer, because company has been an active participant in MWC and had some big launches like Galaxy S II in previous years.
